Far-infrared line deficits in galaxies with extreme ratios
Javier Graciá-Carpio,Eckhard Sturm,S. Hailey-Dunsheath,J. Fischer,A. Contursi,Albrecht Poglitsch,R. Genzel,Eduardo González-Alfonso,Amiel Sternberg,Aprajita Verma,N. Christopher,Ric Davies,Helmut Feuchtgruber,J. A. de Jong,Dieter Lutz,Linda J. Tacconi +15 more
TLDR
In this article, the authors show that galaxies with high L{sub FIR/M{sub H{sub 2} ratios tend to have weaker fine structure lines relative to their far-infrared continuum.Abstract:
We report initial results from the far-infrared fine structure line observations of a sample of 44 local starbursts, Seyfert galaxies, and infrared luminous galaxies obtained with the PACS spectrometer on board Herschel. We show that the ratio between the far-infrared luminosity and the molecular gas mass, L{sub FIR}/M{sub H{sub 2}}, is a much better proxy for the relative brightness of the far-infrared lines than L{sub FIR} alone. Galaxies with high L{sub FIR}/M{sub H{sub 2}} ratios tend to have weaker fine structure lines relative to their far-infrared continuum than galaxies with L{sub FIR}/M{sub H{sub 2}} , or approx. 80 L{sub {circle_dot}}M{sub {circle_dot}}{sup -1}. A deficit of the [C II] 158 {mu}m line relative to L{sub FIR} was previously found with the Infrared Space Observatory, but now we show for the first time that this is a general aspect of all far-infrared fine structure lines, regardless of their origin in the ionized or neutral phase of the interstellar medium. The L{sub FIR}/M{sub H{sub 2}} value where these line deficits start to manifest is similar to the limit that separates between the two modes of star formation recently found in galaxies on the basis of studies of their gas-star formation relations. Our findingmore » that the properties of the interstellar medium are also significantly different in these regimes provides independent support for the different star-forming relations in normal disk galaxies and major merger systems. We use the spectral synthesis code Cloudy to model the emission of the lines. The expected increase of the ionization parameter with L{sub FIR}/M{sub H{sub 2}} can simultaneously explain the line deficits in the [C II], [N II], and [O I] lines.« lessread more
Citations
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Combined co and dust scaling relations of depletion time and molecular gas fractions with cosmic time, specific star-formation rate, and stellar mass
Reinhard Genzel,Linda J. Tacconi,Dieter Lutz,Amélie Saintonge,S. Berta,Benjamin Magnelli,Francoise Combes,Santiago García-Burillo,R. Neri,Alberto D. Bolatto,Thierry Contini,Simon J. Lilly,Jérémie Boissier,Frédéric Boone,Nicolas Bouché,Frédéric Bournaud,Andreas Burkert,Marcella Carollo,Luis Colina,Michael C. Cooper,Peter Timothy Cox,Chiara Feruglio,N. M. Förster Schreiber,Jonathan Freundlich,Javier Graciá-Carpio,Stéphanie Juneau,Katarina Kovac,Magdalena Lippa,T. Naab,P. Salomé,Alvio Renzini,Amiel Sternberg,Fabian Walter,Benjamin J. Weiner,Axel Weiss,Stijn Wuyts +35 more
TL;DR: In this paper, the scaling relations of molecular gas depletion timescale (t depl) and gas to stellar mass ratio (M mol gas/M* ) of 500 star-forming galaxies near the star formation "main-sequence" with redshift, specific star-formation rate (sSFR), and stellar mass (M* ).
Journal ArticleDOI
MASSIVE MOLECULAR OUTFLOWS AND NEGATIVE FEEDBACK IN ULIRGs OBSERVED BY HERSCHEL-PACS*
E. Sturm,Eduardo González-Alfonso,Sylvain Veilleux,J. Fischer,Javier Graciá-Carpio,S. Hailey-Dunsheath,Alessandra Contursi,Albrecht Poglitsch,Amiel Sternberg,Ric Davies,Reinhard Genzel,Dieter Lutz,Linda J. Tacconi,Aprajita Verma,Roberto Maiolino,J. A. de Jong +15 more
TL;DR: In this paper, the authors reported the detection of massive molecular outflows, traced by the hydroxyl molecule (OH), in far-infrared spectra of ULIRGs obtained with Herschel-PACS as part of the SHINING key project.
Journal ArticleDOI
Dusty Star Forming Galaxies at High Redshift
TL;DR: In this paper, the authors summarized the current status of star-forming galaxies (DSFGs) studies, focusing especially on the detailed characterization of the best-understood subset (submillimeter galaxies), and also the selection and characterization of more recently discovered DSFG populations.
Journal ArticleDOI
PHIBSS: Unified Scaling Relations of Gas Depletion Time and Molecular Gas Fractions
Linda J. Tacconi,Reinhard Genzel,Amélie Saintonge,Francoise Combes,Santiago García-Burillo,Roberto Neri,Alberto D. Bolatto,Thierry Contini,N. M. Förster Schreiber,Simon J. Lilly,Dieter Lutz,Stijn Wuyts,Gioacchino Accurso,Jérémie Boissier,Frédéric Boone,Nicolas Bouché,Frédéric Bournaud,Andreas Burkert,M. Carollo,Michael C. Cooper,Pierre Cox,Chiara Feruglio,Jonathan Freundlich,Jonathan Freundlich,Rodrigo Herrera-Camus,Stéphanie Juneau,Magdalena Lippa,Thorsten Naab,Alvio Renzini,P. Salome,Amiel Sternberg,Ken-ichi Tadaki,H. Übler,Fabian Walter,Benjamin J. Weiner,Achim Weiss +35 more
TL;DR: In this paper, the scaling relation between galaxy-integrated molecular gas masses, stellar masses, and star formation rates (SFRs), in the framework of the star formation main sequence (MS), with the main goal of testing for possible systematic effects.
Journal ArticleDOI
Dusty Star-Forming Galaxies at High Redshift
TL;DR: In this paper, the authors summarized the current status of star-forming galaxies (DSFGs), focusing especially on the detailed characterization of the best-understood subset (submillimeter galaxies), who were summarized in the last review of this field over a decade ago, Blain et al.
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